/*
 * Copyright (c) 2015. Ncomz. All Rights Reserved
 */

package com.google.zxing.client.android.camera;

import android.graphics.Point;
import android.hardware.Camera;
import android.os.Handler;
import android.os.Message;
import android.util.Log;

final class PreviewCallback implements Camera.PreviewCallback {

  private static final String TAG = PreviewCallback.class.getSimpleName();

  private final CameraConfigurationManager configManager;
  private       Handler                    previewHandler;
  private       int                        previewMessage;

  PreviewCallback(CameraConfigurationManager configManager) {

    this.configManager = configManager;
  }

  void setHandler(Handler previewHandler, int previewMessage) {

    this.previewHandler = previewHandler;
    this.previewMessage = previewMessage;
  }

  @Override public void onPreviewFrame(byte[] data, Camera camera) {

    Point cameraResolution = configManager.getCameraResolution();
    Handler thePreviewHandler = previewHandler;
    if ( cameraResolution != null && thePreviewHandler != null ) {
      Message message = thePreviewHandler.obtainMessage(previewMessage, cameraResolution.x, cameraResolution.y, data);
      message.sendToTarget();
      previewHandler = null;
    } else {
      Log.d(TAG, "Got preview callback, but no handler or resolution available");
    }
  }
}
